// JavaScript Document

var start   = 0; 
var current = start;
var end = 0;
var theBanner = new Array() 

theBanner[0] =  '<img src="http://www.tijuana.gob.mx/2011_files/top.jpg" width="970" height="169"  />'




function randOrd(){
	return (Math.round(Math.random())-0.5);
} 

theBanner.sort( randOrd );

function showBanner(){
	document.write(theBanner[0]);
}